Retired technician Lao Zhao, after being widowed, falls for the emotional bewitchment of the nanny Xiao Cai. Believing her slanderous words, he fakes an illness to test his children's filial piety, but unexpectedly gets entangled in a senior care fraud syndicate led by Zhang Xiulan. Amidst traps and crises time and again, Lao Zhao wakes up to the realization that family affection cannot rely on probing tests. The father, daughters, and sons work in unison to gather evidence, cooperating with the police to dismantle the senior care fraud chain. The story popularizes anti-fraud knowledge, interprets family affection, protects the rights and interests of the elderly, and promotes the great social righteousness of abiding by the law and doing good.